Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh tai » thanh tai, hang tai, han tai
vanh dai » van dai, vanh tai, lanh dao
sach ky » sac ky, sach y, sach ty
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
xuc ban » duc ban, quoc ban, xuat ban
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky sang ma hoi. hieu va cam ((xuc ban) or (cuc ban)) ((vanh dai) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky sang ma hoi. hieu va cam ((xuc ban) OR (cuc ban)) ((vanh dai) OR (hanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky sang ma hoi. hieu va cam ((xuc ban) or (cuc ban)) ((vanh dai) or (hanh tai)) cua tre*.